Abstract

The spectrum of triply ionized sodium, Na iv, has been studied in the 2500–1300 and 415–135 Å ranges and its analysis extended. About 55 lines in the 2160–1450 Å range have been observed and classified as 3s–3p and 3p–3d combinations, and some 25 lines are either newly observed or newly resolved in the 210–135 Å range. New levels that have been established include 18 levels belonging to the 3p configuration, 16 levels belonging to six new 3d terms, the 5S2 level of 3s, and two (2P)3P levels of 4s. For seven previously known 3s, 3d, 4s, and 4d triplet terms the fine structure has been determined: 19 out of 21 possible levels have now been established. No intercombinations between the 3s, 3p, and 3d quintet system and the singlet–triplet system have been observed. Isoelectronic comparisons in the O i, F ii, Ne iii, Na iv, Mg v sequence have been made as have least squares fits of theoretical energy expressions to observed 3s, 3p, and 3d levels of Na iv. The 3s, 3p, and 3d configurations show good LS purity.

© 1976 Optical Society of America

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References

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  1. Ch. E. Moore, Atomic Energy Levels, Vol. I, Natl. Bur. Stand. (U.S.) Circ. No. 467 (U.S.G.P.O., Washington, D. C., 1949).
  2. J. Söderqvist, Nova Acta Reg. Soc. Sci. Uppsala IV 9, No. 7 (1934).
  3. J. Söderqvist, Ark. Mat. Astron. Fys. (Stockholm) 32A, No. 19 (1946).
  4. I. S. Bowen, Astrophys. J. 132, 1 (1960).
    [Crossref]
  5. M. Gaillard, P. Ceyzeriat, A. Denis, and M. Dufay, C. R. Acad. Sci. B (Paris) 269, 526 (1969).
  6. M. Dufay, M. Gaillard, and M. Carré, Phys. Rev. A 3, 1367 (1971).
    [Crossref]
  7. T. Goto, M. S. Gautam, and Y. N. Joshi, Physica (Utrecht) 66, 70 (1973).
    [Crossref]
  8. T. Goto, M. S. Gautam, and Y. N. Joshi, Can. J. Phys. 51, 1244 (1973).
    [Crossref]
  9. L. Minnhagen and H. Nietsche, Phys. Scr. 5, 237 (1972).
    [Crossref]
  10. L. Minnhagen, Phys. Scripta 11, 38 (1975).
    [Crossref]
  11. T. Lundström and L. Minnhagen, Phys. Scr. 5, 243 (1972).
    [Crossref]
  12. B. Edlén, Encyclopedia of Physics, Vol. 27 (Springer-Verlag, Heidelberg, 1964), p. 172.

1975 (1)

L. Minnhagen, Phys. Scripta 11, 38 (1975).
[Crossref]

1973 (2)

T. Goto, M. S. Gautam, and Y. N. Joshi, Physica (Utrecht) 66, 70 (1973).
[Crossref]

T. Goto, M. S. Gautam, and Y. N. Joshi, Can. J. Phys. 51, 1244 (1973).
[Crossref]

1972 (2)

L. Minnhagen and H. Nietsche, Phys. Scr. 5, 237 (1972).
[Crossref]

T. Lundström and L. Minnhagen, Phys. Scr. 5, 243 (1972).
[Crossref]

1971 (1)

M. Dufay, M. Gaillard, and M. Carré, Phys. Rev. A 3, 1367 (1971).
[Crossref]

1969 (1)

M. Gaillard, P. Ceyzeriat, A. Denis, and M. Dufay, C. R. Acad. Sci. B (Paris) 269, 526 (1969).

1960 (1)

I. S. Bowen, Astrophys. J. 132, 1 (1960).
[Crossref]

1946 (1)

J. Söderqvist, Ark. Mat. Astron. Fys. (Stockholm) 32A, No. 19 (1946).

1934 (1)

J. Söderqvist, Nova Acta Reg. Soc. Sci. Uppsala IV 9, No. 7 (1934).

Bowen, I. S.

I. S. Bowen, Astrophys. J. 132, 1 (1960).
[Crossref]

Carré, M.

M. Dufay, M. Gaillard, and M. Carré, Phys. Rev. A 3, 1367 (1971).
[Crossref]

Ceyzeriat, P.

M. Gaillard, P. Ceyzeriat, A. Denis, and M. Dufay, C. R. Acad. Sci. B (Paris) 269, 526 (1969).

Denis, A.

M. Gaillard, P. Ceyzeriat, A. Denis, and M. Dufay, C. R. Acad. Sci. B (Paris) 269, 526 (1969).

Dufay, M.

M. Dufay, M. Gaillard, and M. Carré, Phys. Rev. A 3, 1367 (1971).
[Crossref]

M. Gaillard, P. Ceyzeriat, A. Denis, and M. Dufay, C. R. Acad. Sci. B (Paris) 269, 526 (1969).

Edlén, B.

B. Edlén, Encyclopedia of Physics, Vol. 27 (Springer-Verlag, Heidelberg, 1964), p. 172.

Gaillard, M.

M. Dufay, M. Gaillard, and M. Carré, Phys. Rev. A 3, 1367 (1971).
[Crossref]

M. Gaillard, P. Ceyzeriat, A. Denis, and M. Dufay, C. R. Acad. Sci. B (Paris) 269, 526 (1969).

Gautam, M. S.

T. Goto, M. S. Gautam, and Y. N. Joshi, Physica (Utrecht) 66, 70 (1973).
[Crossref]

T. Goto, M. S. Gautam, and Y. N. Joshi, Can. J. Phys. 51, 1244 (1973).
[Crossref]

Goto, T.

T. Goto, M. S. Gautam, and Y. N. Joshi, Physica (Utrecht) 66, 70 (1973).
[Crossref]

T. Goto, M. S. Gautam, and Y. N. Joshi, Can. J. Phys. 51, 1244 (1973).
[Crossref]

Joshi, Y. N.

T. Goto, M. S. Gautam, and Y. N. Joshi, Physica (Utrecht) 66, 70 (1973).
[Crossref]

T. Goto, M. S. Gautam, and Y. N. Joshi, Can. J. Phys. 51, 1244 (1973).
[Crossref]

Lundström, T.

T. Lundström and L. Minnhagen, Phys. Scr. 5, 243 (1972).
[Crossref]

Minnhagen, L.

L. Minnhagen, Phys. Scripta 11, 38 (1975).
[Crossref]

T. Lundström and L. Minnhagen, Phys. Scr. 5, 243 (1972).
[Crossref]

L. Minnhagen and H. Nietsche, Phys. Scr. 5, 237 (1972).
[Crossref]

Moore, Ch. E.

Ch. E. Moore, Atomic Energy Levels, Vol. I, Natl. Bur. Stand. (U.S.) Circ. No. 467 (U.S.G.P.O., Washington, D. C., 1949).

Nietsche, H.

L. Minnhagen and H. Nietsche, Phys. Scr. 5, 237 (1972).
[Crossref]

Söderqvist, J.

J. Söderqvist, Ark. Mat. Astron. Fys. (Stockholm) 32A, No. 19 (1946).

J. Söderqvist, Nova Acta Reg. Soc. Sci. Uppsala IV 9, No. 7 (1934).

Ark. Mat. Astron. Fys. (Stockholm) (1)

J. Söderqvist, Ark. Mat. Astron. Fys. (Stockholm) 32A, No. 19 (1946).

Astrophys. J. (1)

I. S. Bowen, Astrophys. J. 132, 1 (1960).
[Crossref]

C. R. Acad. Sci. B (Paris) (1)

M. Gaillard, P. Ceyzeriat, A. Denis, and M. Dufay, C. R. Acad. Sci. B (Paris) 269, 526 (1969).

Can. J. Phys. (1)

T. Goto, M. S. Gautam, and Y. N. Joshi, Can. J. Phys. 51, 1244 (1973).
[Crossref]

Nova Acta Reg. Soc. Sci. Uppsala IV (1)

J. Söderqvist, Nova Acta Reg. Soc. Sci. Uppsala IV 9, No. 7 (1934).

Phys. Rev. A (1)

M. Dufay, M. Gaillard, and M. Carré, Phys. Rev. A 3, 1367 (1971).
[Crossref]

Phys. Scr. (2)

L. Minnhagen and H. Nietsche, Phys. Scr. 5, 237 (1972).
[Crossref]

T. Lundström and L. Minnhagen, Phys. Scr. 5, 243 (1972).
[Crossref]

Phys. Scripta (1)

L. Minnhagen, Phys. Scripta 11, 38 (1975).
[Crossref]

Physica (Utrecht) (1)

T. Goto, M. S. Gautam, and Y. N. Joshi, Physica (Utrecht) 66, 70 (1973).
[Crossref]

Other (2)

Ch. E. Moore, Atomic Energy Levels, Vol. I, Natl. Bur. Stand. (U.S.) Circ. No. 467 (U.S.G.P.O., Washington, D. C., 1949).

B. Edlén, Encyclopedia of Physics, Vol. 27 (Springer-Verlag, Heidelberg, 1964), p. 172.

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Figures (7)

FIG. 1
FIG. 1

Isoelectronic comparison of (4S)3s-(4S)3p and (2D)3s-(2D)3p combinations. ζ is the net charge of the core.

FIG. 2
FIG. 2

Isoelectronic comparison of (2D)3s 1D-(2D)3p 1F, 1D combinations. (Dashed lines indicate Ne iii combinations hitherto unknown.)

FIG. 3
FIG. 3

Isoelectronic comparison of (2P)3s3P-(2P)3p 3D combinations. (Dashed lines indicate tentative Ne iii combination.)

FIG. 4
FIG. 4

Isoelectronic comparison of 2p33p-2p33d combinations. (Dashed lines: see caption Fig. 2.)

FIG. 5
FIG. 5

Isoelectronic comparison of 2p3(2D)3p levels. [Dashed lines indicate tentative, (2D)3p 1F3, or missing Ne iii levels.]

FIG. 6
FIG. 6

Isoelectronic comparison of 2p3(2D)3d levels. [Dashed lines indicate missing Ne iii levels. Dashed–dotted lines indicate that the observed Mg v levels are located relative to (2D)3d 3G5 by extrapolation.]

FIG. 7
FIG. 7

Isoelectronic comparison of 2p3(2P)3d levels. [(2P)3d 1P1, which is very high in Na iv and Mg v (see text), excluded. Dashed and dashed–dotted lines: see caption Fig. 6.]

Tables (7)

Tables Icon

TABLE I Classified Na iv lines in the 415–135 Å range. Description of lines: bl = blended (by); m = masked(by); pr = partly resolved; ul, us = unsymmetrical, shaded to longer and shorter wavelengths, respectively.

Tables Icon

TABLE II Classified 3s-3p and 3p-3d lines of Na iv in the range 2160–1450 Å. Description of lines: see Table I.

Tables Icon

TABLE III Even energy levels of Na iv (in cm−1).

Tables Icon

TABLE IV Odd energy levels of Na iv (in cm−1).

Tables Icon

TABLE V Observed and calculated 2p33s levels (cm−1) (LS coupling, purity nearly 100%). E(av) = 521 533 ± 57; α(2p, 2p) = 866 ± 14; F2(2p, 2p) = 118 792 ± 159; G1(2p, 3s) = 9562 ± 86; ζ(2p) = 1250 fixed.

Tables Icon

TABLE VI Observed and calculated 2p33p levels (cm−1); LS compositions. (Purities in excess of 98% and components less than 4% omitted.) E(av) = 572 390 ± 123; α(2p, 2p) = 1027 ± 26; F2(2p, 2p) = 116 978 ± 343; F2(2p, 3p) = 34 028 ± 1053; G0(2p, 3p) = 6470 ± 82; G2(2p, 3p) = 10 074 ± 241; ζ(2p) = 1266 fixed; ζ(3p) = 143 ± 94.

Tables Icon

TABLE VII Observed and calculated 2p33d levels (cm−1); LS compositions. (Purities in excess of 98% and components less than 4% omitted.) E(av) = 633 863 ± 193; α (2p, 2p) = 914 ± 49; F2(2p, 2p) = 119 394 ± 546; F2(2p, 3d) = 15 957 ± 2570; G1(2p, 3d) = 11 316 ± 444; G3(2p, 3d) = 4246 ± 807; ζ(2p) = 1263 fixed; ζ(3d) = 5.3 fixed.